Since 28 February 2026, commercial navigation through the Strait of Hormuz has been severely constrained in operational terms, creating what can effectively be described as a practical interruption of transit for many vessels intending to cross the area. Dozens of ships are currently holding position nearby or waiting outside the region for further instructions.
In this context, the legal consequences arise immediately across several core aspects of maritime operations, including charterparties, bills of lading (B/Ls), insurance coverage, and the management of time and cost risks.
Deviation and Route Decisions
The current circumstances significantly strengthen the legal justification for avoiding transit through the Strait. Under Article IV(4) of the Hague–Visby Rules, a carrier may undertake a reasonable deviation, and when assessed ex anteagainst the present situation—characterized by direct military threats, confirmed attacks, and an objective risk to both crew and vessel—it is difficult to argue that rerouting through an alternative passage would be unreasonable.
However, an important distinction must be made between two different legal frameworks:
Deviation during the performance of carriage under the bill of lading, and
- Reconfiguration of the voyage under a charterparty agreement.
- The contractual protections and legal standards governing these scenarios may diverge.
In particular, where a “liberty” or “war risks” clause agreed within the charterparty has not been validly incorporated into the bill of lading, the carrier’s position toward B/L holders may not fully align with the contractual relationship between charterer and shipowner.
For this reason, a careful review of documentation is essential, especially regarding:
-
Incorporation clauses linking the charterparty to the bill of lading
-
Agreed route and destination terms
-
Notification obligations and duties to mitigate losses
War Risk Insurance and Coverage Adjustments
The insurance market appears to have reacted swiftly, particularly regarding war risk coverage. A number of insurers have already issued notices of cancellation or modification, often accompanied by territorial restrictions extending to surrounding areas.
It is important to remember that war risk insurance is an extraordinary layer of coverage. As a result, other elements of maritime insurance programs—such as Hull & Machinery (H&M), Protection & Indemnity (P&I), and cargo insurance—generally remain unaffected.
War risk clauses typically allow insurers to cancel or amend coverage with a minimum notice period. Several insurers have already exercised this right, and in some cases the changes are taking effect now.
These measures should not be interpreted as a total withdrawal of protection. Instead, they operate through a technical cancellation-and-reinstatement mechanism:
-
The existing coverage is cancelled after notice.
-
A new version of the policy is automatically reinstated, incorporating specific geographical exclusions or revised risk parameters.
-
All other policy terms remain unchanged.
This mechanism allows insurers to adjust coverage dynamically in response to rapidly evolving war risks.
Contractual Risk Allocation and Documentation
Taken together, the current situation requires immediate review of:
-
Charterparty terms
-
War risk insurance coverage
-
Operational costs and delay exposure
For the foreseeable future, the industry faces a temporary but significant redistribution of contractual risk. In such circumstances, the quality of documentation becomes critical.
Records of decision-making processes, risk assessments, communications, deviation notices, and supporting evidence may ultimately determine the strength of a party’s legal position in any subsequent disputes.
Until normal transit conditions are restored—if and when that occurs—operators, charterers, and insurers alike must navigate not only operational disruption but also a rapidly evolving legal landscape governing maritime risk allocation.